It was with great joy _______ he worked out theproblem that he had long been puzzled about.

I call you by your firstname —Yes, you______

You see, I’m poor in maths, you are not good at English, and..— That’s ____ we should help each other

Miss Li is one of _______ in our school.

I’m sorry I can’t help ___________ the flowers, because I’m busy preparing for the singing competition _____________ tomorrow